SO Construction

Question 1

Plywood is considered how thick for all math problems?

Answer 1

1”

Question 2

BoM

Answer 2

Bill of materials

Question 3

BF

Answer 3

Board feet

Question 4

BF equation

Answer 4

(T x W x L x #pieces)/(12 or 144)

T=thickness
W=width
L=length

If L is feet, divide by 12
If L is inches, divide by 144

Question 5

BM

Answer 5

Board measure

Question 6

BM equation

Answer 6

If thickness is 1” or less, add 20%
If thickness is 2” or more, add 10%
If plywood, add nothing

Question 7

Sheathing

Answer 7

Covers floors, walls and roof. Trim boards and plywood are considered sheathing.

All sheathing considered 1” for formulas.

Question 8

BF per piece of plywood

Answer 8

32

Question 9

4 types of nails

Answer 9

Common
Finishing
Scaffolding
Roofing

Question 10

Measurement for nails

Answer 10

Penny = d
2d through 60d
1” to 6”

Question 11

Framing Nail formula

Answer 11

(10d to 60d)

Lbs(P)=(d/6) x (BM/100)

Question 12

Sheathing Nail Formula

Answer 12

(2d to 8d)

Lbs(P)=(d/4) x (BM/100)

Question 13

Design life

Answer 13

How long structure will be in place without major repairs.

Permanent= 25 years+
Semi-permanent= 5 to 25 years
Temporary= less than 5 years

Question 14

3 types of framing

Answer 14

Platform
Balloon
Braced

Question 15

Substructure:

footer

Answer 15

Footing, spreaders, post and scabs

From présure treated lumber, no more than 10 ft apart. Usually made from 2x6

Question 16

Substructure:

Girder

Answer 16

Connects footers, solid or laminated 2x6

Question 17

Substructure:

Joists

Answer 17

Run width of the building
16” on center
Run perpendicular to load bearing walls and girders

Question 18

Substructure:

Bridging

Answer 18

Solid and cross

Connect joists

Question 19

Substructure:

Splice plates

Answer 19

Same lumber as joists, 24” in length

Question 20

Sub floor

Answer 20

First layer of floor sheathing
Perpendicular to joists
Offset joints by starting with 1/2 sheet

Question 21

All wood should be treated within how many inches off the ground?

Answer 21

18”

Question 22

How thick is the sub floor usually?

Answer 22

3/4” treated plywood

Question 23

Finish floor

Answer 23

Layed offset to sub floor

3/4” untreated plywood

Question 24

Floor sheathing formula

Answer 24

(L x W) / (32) round up then double

Question 25

Tread distance while in SOC

Answer 25

11”

Question 26

2x4 at the bottom of stringer

Answer 26

Mud sill

Question 27

2x4 at the top of stringer

Answer 27

Hanger/ledger

Question 28

3 walls

Answer 28

Long walls
Short walls
Partition walls

Question 29

Stud distance

Answer 29

16” on center

Question 30

Wall tie

Answer 30

Extra stud for wall to be nailed to

Question 31

Which walls sheathing overlaps the other

Answer 31

Short wall overlaps long wall

Question 32

Exterior sheething formula

Answer 32

(Linear feet x height)/32 round up

Question 33

What is the superstructure

Answer 33

Walls and Roof of a structure

Question 34

Rafters

Answer 34

Span half the building

16” on center

Question 35

Truss

Answer 35

Two top chords and two bottom chords

24” on center

Question 36

Which trusses have gussets on one side

Answer 36

Gable end trusses

Question 37

Purloins

Answer 37

24” on center
Temporary and permanent 
2x4 
Top and bottom use double purloins
Measure from outside of fascia board

Question 38

Roof sheathing

Answer 38

Start at the bottom and work towards peak.
Offset joints
2” gap at peak

Question 39

Roof sheathing formula

Answer 39

(Total rafter length x total building length)/32 round up and double

Question 40

Applying roof paper

Answer 40

2” overlap @ horizontal seams
4” overlap @ vertical seams
Instal L to R or R to L

Question 41

10 parts of a wall

Answer 41

Bottom plate
Stud
Jack stud
King stud
Header
Sill
Crippled
Fire block
Top plate 
Double top plate

Question 42

10 parts of a truss

Answer 42

Hanger
Long web
Short web
Gusset
Bottom chord
Top chord
Heel/reference point
Quarter point
Third point
Peak point